There are three changes in this diff. The first two produce ​broken output, the last one is fine.

put "is" on the next line, problem is missing space, resulting in None not being monospace (generated reST: Typically you only pass in one interface, and the mind is``None``)

putting *interfaces in <code> tags, converter doesn't add backticks, Sphinx somehow manages to interpret the result as a link (???) (generated reST: which was one of the interfaces passed in the *interfaces tuple)

something about myapp_plugins.py, which works fine

This is impossible to fix in the conversion script, so this Sphinx file requires manual intervention. Neither change is particularly hard: one space and two pairs of backticks.